| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be often [verb] that [pron] | 25 |
|
| 2 | it [be] often [verb] that [pron] | 25 |
|
| 3 | it [is] often [verb] that [pron] | 23 |
|
| 4 | it is often [verb] that [pron] | 22 |
|
